Chemical cooling stick for beverages



March 6, 1962 A. A. ROBBINS CHEMICAL COOLING STICK FOR BEVERAGES FiledApril '7, 1958 INVENTOR. 445z74 foxes/w, .BY

ire tires att 3,023,587 CIEMICAL COOLKNG STICK FOR BEVERAGES Albert A.Robbins, West Covina, Califi, assignor to Kwik- Kold of America, Inc.,Las Vegas, Nev., a corporation of Nevada Filed Apr. 7, 195a, Ser. No.726,794 3 Claims. (Cl. 62-4) This invention relates to a chemicalcooling stick for beverages whereby a beverage may be quickly cooled bymeans of a chemical cooling package attached to a stirring stick, thecooling stick being activated at the time that the beverage is to becooled, and this chemical cooling package on the stick will remain at alow temperature for a considerable period of time. This. invention is animprovement on my co-pending applications: Serial No. 582,748, nowPatent 2,907,173; Serial No. 591,757, now Patent No. 2,882,691; SerialNo. 591,758, now Patent No. 2,898,744; Serial No. 603,059, nowabandoned; Serial No. 624,097, now Patent No. 2,882,692; Serial No.624,098, now Patent No. 2,916,886; and Serial No. 624,142, nowabandoned.

An object of my invention is to provide a novel chemical cooling stickfor beverages consisting of an outer envelope which is attached to astirring stick and which also contains a crystalline freezing compound;this outer envelope also containing another envelope therein whichcontains a fluid which cooperates with the crystalline cooling chemical,and which may be readily broken or torn for the purpose of permittingthe liquid or fluid ma-- terial to admix with the dry crystallinechemical.

Still another object of my invention is to treat the inner bag so thatthe film composing the bag is weakened and will readily burst or tearunder pressure to permit the fluid or fluid chemical to readily adrnixwith the dry crystalline chemical, thus providing a reduced temperaturewithin the outer bag.

A feature of my invention resides in the manner in which the drycrystalline chemical may be compressed into a block or pencil-likestructure to reduce the area occupied by the chemical within the outerbag, and also to materially stiffen the bag so that it may be readilyused as a stirring implement for the beverage.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description and theappended claims.

In the drawing:

FIGURE 1 is a side elevation of a glass in which my chemical coolingstick is placed.

FIGURE 2 is a side elevation of my chemical cooling stick for beverages.

FIGURE 3 is a side elevation of the chemical cooling stick with partsbroken away to show interior construction.

FIGURE 4 is an enlarged sectional view taken on line 4-4 of FIG. 3.

It is well known in the chemical art that certain chemicals absorb heatwhen water is added thereto, this heat being obtained from adjacentbodies by means of conduction, convection or radiation, or perhaps allthree. These so-called freezing mixtures, which will hereinafter be thustermed, consist of any of the following chemicals, or many others havingthis same property. These freezing mixtures have the following formulae:

Na CO 1 NH CI Na SO c301, NH4NO3 The dry chemical in the chemicalcooling stick preferably consists of ammonium nitrate (NH NO or asimilar freezing compound or product of heat absorbing salt or saltswhen water or some hydrous material is added thereto. The liquid productmay be either plain water or it may be a solution of sodium carbonate(Na OO .1OH O).

The chemical cooling stick for beverages consists of a rigid tube orstick 1 of suflicient length to insert into a suitable beverage glass 2,and which is used for the purpose of stirring the beverage therein. Anouter bag 3 is formed of a flexible plastic sheet material, such aspolyethylene, although other plastic materials may be used, such asvinyl or acetate. This plastic sheet material is very flexible and canbe bent, folded, creased, or otherwise manipulated without breaking,cracking, or injuring that sheet material in any manner. The outerenvelope 3 is formed by hermetically sealing all four edges 4 thereof bysuitable means, such as heat and adhesive or similar means. One verticaledge 5 of the en velope may be somewhat greater in width and is fixedlyattached to the stick 1 by appropriate means, such as the staples 6. Thelower portion of the envelope 3 is filled with a dry chemical freezingcompound 7, such as ammonium nitrate (NH NO This dry or soluble saltmixture or crystalline freezing compound may be tightly compressed orextruded to form a relatively thin pencil-like structure which will besufliciently rigid, and will support or reinforce the outer bag 3 sothat the bag itself will become quite rigid and may be used as astirring means for the beverage which are without the attached stick 1.In other words, the bag 3 may be sufliciently rigid in itself so thatthe stick 1 may be eliminated and the bag itself used as the stirringmeans for the beverage. A second bag 8 is positioned within the outerbag 3 and is a substantially close fit within the bag 3, that is, thereis a very small space between the wall of the bag 8 and the innersurface of the bag 3. The inner bag 8 is also formed of a thin plasticsheet material, such as polyethylene, vinyl or acetate, and is also veryflexible and can be bent, folded or creased under normal usage orpackaging without breaking the sheet material. The bag 8 is completelyfilled with a fluid, such as a solution of sodium carbonate (Na CO .10HO). The envelope 8 is formed in substantially the same manner as theouter bag 3, in that the edges 9 thereof are hermetically sealed bysuitable means, such as heat, an adhesive, or similar means.

It is desirable that when pressure is applied to the bag 8 that thelower portion thereof shall be ruptured, thus depositing the fluiddirectly onto the dry crystalline chemical compound, and to insure thatthe bag 8' will be ruptured at the proper place when pressure is appliedthereto 1 weaken or reduce the thickness of the plastic film by treatingthe lower portion of the bag 8, or any portion thereof which might bedesired, with a solvent for the plastic of which the bag is made. If thebag is made of polyethylene the solvent may be parafiin, parafiin oil,as well as benzine, xylene, toluene, trichlorethylene, carbontetrachloride, chlorobenzine, petroleum ether, tetrohvdronaphthalene,turpentine, etc. If poly iso butylene is added to or incorporated invarious proportions with the polyethylene film then the solvent willwork at room temperature, that is, around to F. The plasticizer for thesolvent of polyethylene film is poly iso butylene. The temperature atwhich the polyethylene bag will be weakened by the solvent varies withthe amount of poly iso butylene which is added to the solvent and to theplasticizer. If the inner bag 8 is formed of polyethylene film andpositioned within the outer bag 3, the use of poly iso butyleneincorporated in the film or dissolved in any one of the solventsmentioned above and placed in one or several spots on the bag 8 will soweaken the film forming the wall of the bag in these spots so that thebag will readily burst under pressure. The weakening of the wall of thefilm is confined to the area so spotted or covered with the solvent andthe poly iso butylene and does not elfect other areas of thefilm whichhas not been touched, sprayed or dipped in the solvent and theplasticizer. Thus when pressure is applied to the outer bag 3 the innerbag 8 will be ruptured, causing the contents of the bag 8 to mix withthe contents of the bag: 3. The weakening of the inner bag 8, asdescribed above, is desirable in the present structure due to the factthat: the bag 8 closely approximates the inside diameter of the bag 3,thus restricting the required expansion of the bag 8 when pressure isexerted thereon and prior to the time that the bag 8 will burst. Withthe weakened spotsor area of the bag 8 this bag can be broken, burst orruptured, particularly at the lower end thereof, so that the fluid orhydrous contents of this bag will flow out and mix with the crystals inthe bag 3. In my cooling stick it is necessary that the inner bag 8 maybe ruptured by pressure of the fingers, or by simply squeezing the outerbag and thus causing pressure on the inner bag 8. To increase thesolvency of poly iso butylene a small quantity of oxidized linseed oilcan be added theretobefore the poly iso butylene is added to the solventand before application to the polyethylene film, or incorpo- :rated withthe film.

Other films may be used instead of polyethylene, such as the cellulosetypes which are soluble in ethanol, butyl acetate, amyl acetate, etc.,without the use of poly iso butylene. Also the vinyl types of filmsoluble in butyl acetate, amyl acetate, etc. That is, the variousplastic films have their particular plasticizers and solvents which arewell known and which can be used to weaken the particular film asufiicient amount so that the inner bag will readily rupture withoutbreaking or injuring the outer bag which remains intact after pressureand retains the cold producing elements therein.

Having described my invention, I claim:

1. A chemical cooling stick for beverages comprising an outer envelope,all the edges of said envelope being hermetically sealed to preventescape of any material therefrom, said outer envelope being formed of athin flexible plastic sheet material, a bag within said outer envelope,said bag being substantially the same diameter as the outer envelope andof lesser length than the outer envelope and positioned at the upper endof said outer envelope, said bag being formed of a thin flexible plasticsheet material, said outer envelope containing a dry freezging chemicalmixture, said bag containing a hydrous substance, the hydrous substancefiltering down through the dry freezing chemical mixture after ruptureof said bag, a stirring stick, and means securing one edge of the outerenvelope to said stirring stick.

2. A chemical cooling stick for beverages comprising an outer envelope,all of the edges of said envelope being hermetically sealed to preventescape of any material therefrom, said outer envelope being formed of athin flexible plastic sheet material, a bag within said outer envelope,said bag being substantially the same diameter as the outer envelope andof lesser length than the outer envelope and positioned at the upper endof said outer envelope, said bag being formed of a thin flexible plasticsheet material, said outer envelope containing a dry freezing chemicalmixture, said bag containing a hydrous substance, the hydrous substancefiltering down through the dry freezing chemical mixture after ruptureof said bag, a portion of the Wall of said bag being thinner than theremaining portion of the bag whereby said bag will rupture underpressure without breaking the outer envelope, a stirring stick, andmeans securing one edge of the outer envelope to said stirring stick.

3. A chemical cooling stick for beverages comprising an outer envelope,all of the edges of said envelope being hermetically sealed to preventescape of any material therefrom, said outer envelope being formed of athin flexible plastic sheet material, a bag within said outer envelope,said bag being substantially the same diameter as the outer envelope andof lesser length than the outer envelope, said bag being formed of athin flexible plastic sheet material, said bag completely occupying theupper end of the outer envelope, said outer envelope containing a dryfreezing chemical mixture in the end thereof not occupied by the bag,said bag containing a hydrous substance adapted to mix with the dryfreezing chemical mixture upon breaking of the bag, the hydroussubstance filtering down through the dry freezing chemical mixture afterrupture of said bag, a stirring stick, and means securikng one edge ofthe outer envelope to said stirring strc References Cited in the file ofthis patent UNITED STATES PATENTS 1,897,723 Free Feb. 14, 1933 2,120,201Fisk Jan. 16, 1937 2,340,037 Zipper Ian. 25, 1944 2,615,037 Cohen Oct.28, 1952 2,687,130 Cohen Aug. 24, 1954 2,714,974 Sawyer Aug. 9, 19552,746,265 Mills May 22, 1956 2,882,691 Robbins Apr. 21, 1959 FOREIGNPATENTS .l,054,170 France Oct. 7, 1953

1. A CHEMICAL COOLING STICK FOR BEVERAGES COMPRISING AN OUTER ENVELOPE,ALL THE EDGES OF SAID ENVELOPE BEING HERMETICALLY SEALED TO PREVENTESCAPE OF ANY MATERIAL THEREFROM, SAID OUTER ENVELOPE BEING FORMED OF ATHIN FLEXIBLE PLASTIC SHEET MATERIAL, A BAG WITHIN SAID OUTER ENVELOPE,SAID BAG BEING SUBSTANTIALLY THE SAME DIAMETER AS THE OUTER ENVELOPE ANDOF LESSER LENGTH THAN THE OUTER ENVELOPE AND POSITIONED AT THE UPPER ENDOF SAID OUTER ENVELOPE, SAID BAG BEING FORMED OF A THIN FLEXIBLE PLASTICSHEET MATERIAL, SAID OUTER ENVELOPE CONTAINING A DRY FREEZING CHEMICALMIXTURE, SAID BAG CONTAINING A HYDROUS SUBSTANCE, THE HYDROUS SUBSTANCEFILTERING DOWN THROUGH THE DRY FREEZING CHEMICAL MIXTURE AFTER RUPTUREOF SAID BAG, A STIRRING STICK, AND MEANS SECURING ONE EDGE OF THE OUTERENVELOPE TO SAID STIRRING STICK.